Elevator-indicator.



J. D. GRIFFEN.

ELEVATOR INDIGATOR.

APPLICATION FILED MAR. 22, 1897.

91 L BQSV Patented Feb. 2, 1909. I

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ELEVATOR INDICATOR. APPLIOAITION FILED MAR 22/1897 Patented Feb. 2, 1909.

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J. n! GRIFFEN. ELEVATOR INDLUATOR. APPLICATION FILED MAR. 22, 1897.

Patented Feb. 2, 1909.

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UNITED STATES oirFroE.

JOHN D. GRIFFEN, OF NEW YORK, N. Y.

ELE VA'IOB-INDICATSEZ.

of New York, in the county of New York and State of New York, hare invented certain new and useful Improvements in Elevator-Indicators, oil which the following is a specification. v

This invention relates to fioor ll'lClltl lOlS for elevators, and the in ention consists of an indicator for th s purpose constructed to simnltanemisl v indlcatc at ach hall or tloor of the building and by means of electric lights, the location and the progress up or down of the elevator car or cage.-

The invention also consists in the special construction of the electric circuit closer or switch employed and the means for operating the same or any proper type of switch for illuminating the lamps. and the invention also consists in the construction of the exposed portions of the indicators.

The invention also consists in the construction, arrangement and combination of parts all as hereinafter described and claimed.

In the accompanying drawings to which reference is made and which form a part of this specification-Figure 1 shows in diagram the arrangement and method of operation of my new elevator indicators and also the electric circuits. is an enlarged sectional front elevation of one of the indi cators constructed for a six story building. Fig. is a sectional side eleration of the same. Fig. is a transverse sectional plan View of the same. Fig. 5 is an enlarged front View of the electric switch or circuit breaker showing the circuit broken. Fig. 6 is a sectional end elevation of the same. Fig. 7 isa sectional plan \lQW of the same; and Fig. 8 is a front elevation showing the cir cuit closed.

In the drawings 2.2, represent a series or group of electric lights. each series comprising as many individual lamps as there are stories in the building, and one of these series or groups of lamps is to be locateo in each hall of the building near the elevator entrance or in convenient view of persons desiring to take the elevator. The said groups of electric lamps are held by a transparency supported primarily by a back plate a which may be secured to the wall or other suitable support by screws or bolts passed through Specification of Letters Patent.

Application filed March 22, 1897.

the apertures 5, 5. The apertures 6, 6 in Patented Feb. 2, 1909.

Serial No. 623,791.

said back plate 4 are for the passage of ti electric wires to and from the electric lam;

A front casing 3, by preference'ot metal, .3 secured to the base plate 4; and is proviocd with a series of front apertures 3 one for each lamp and with as many side apertures 3 in the s de walls. These said apertures are closed by panes of glass 7- preferably 'ound glws-on which numbers appear in c ice from the bottom upward corresponding to the stories of the building. T he lamps are mounted upon anintermediate plate 8, provided with top and bottom pieces 9, 9..

which close in the upper and lower side the outer pair of lamps in the series.

10, 10 are horizontal partitions of wood, metal or other non-t "ans-parent substance so that the light of each lamp is confined to its own separate compartment 12 and illuminatesonly the transparent panes '7 in its own compartment.

The electric lamps are connected in multiple-arc to a main circuit comprising aplus' wire 13 and as many return wires 14 as there are lamps in each bank or group of lamps. Each lamp in the system is connectedfby a wire 15 with the plus wire 13 and thel'a'mps in each group which indicate the separate stories in the building are connected to one :t the return wires 1% each by a wire 16 for the first story lamps. 17 for the second story lamps, 18 for the third storrlamps' and so on so that when, by means of the switch 19 operated by the car, any particular circuit is closed say circuit 13, Stat and 17 at the second story through the switch at that story, the lamp in each group corresponding to that; story will glow as clearly indicated inl ig. 1. It will be seen that there is. combined with the series of groups of indicators,-which may be. lamps or other indicators, and with. the main wires of the circuit, a switch device at each floor, and that the b anch connections are so made between the difi'erent wires that each group of indicators indicating the-same noor completes its circuit through the switch at that floor when that switch is closed and preferably constructed as shown in Figs. 5,

6, 7 and SIIGXt tobe described with its connectionsand is operated to make and break the circuit by means of a cam secured to the body of the elevator cage or car the circult being closed during the progress of the car past each circuit closer: and open at all other times.

.. Theswitch or circuit closer comprises a {sliding bar 21 mounted to slide in bearings 22, 22 and held by a .frame or back plate 23 to-take the thrust of the cam 20 on the car.

Its outerend is by preference provided with an anti-friction roller 24 while its inner end is prov ded with a limit or stop flange 25 faced with a cushion 26 to obviate noisy contact with the adjacent bearing 22. The bar 21 is normallyheld thrust out into the path of the cam 20 by one or more springs 27 pref- .erably action of, the contact points 28 is desirable.-

This I accomplish by a peculiarly constructed lever 31 to which the said contact points are fastened by a piece of hard india-rubber or other suitable insulating material 32. The

' ,saidlever 31 ispivoted at 33 and-between this pivot and the insulation the said lever is formed with an incline or cam 34. On the opposite side of the pivot 33 thelever is formed with another incline 35. These two .inclines 34, 35 are operated upon by an arm 37 attached to the bar 21 so that when the said bar is thrust inward the arm 37 will strike the incline 34 and force that end of the lever suddenly downward and make the contact asshown in Fig. 8. And when the bar 21 is returned by the springs 27 the said arm 37 will'act on the incline 35 and elevate the opposite end of the lever and break the contact as shown in Fig. 5.

To augment the sudden upward movement of the lever and contact points, I employ a spring 38 which is bent to form a cam 39 which is so arranged that a slight downward movement of the lever will carry the end of the lever against the slope of the cam whereupon the spring and cam will act to lift the opposite end of the lever so suddenly that sparking between the contact points and terminals is practically obviated.

The spring 38 is pivoted at 40 and its lower end rests against an adjusting screw 11 by which the pressure or tension of the spring may be regulated.

The upward movement of the lever 31 is limited by a stop movement is limited by another stop 43.

The terminals 29 and 30 are suitably connected to the wires 16, 17, 18, and 14; according to the location of the parts in the shaft of the elevator.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is 1. An elevator indicator comprising several groups of electric lamps located one in each stcrry of the building, an electric switch or circuit closer for each group of lamps, a cam on the elevator car for operating the said switches or circuit closers, and electric circuits each including one of the circuit breakers and one lamp 1n each group of lamps, substantially as described.

2. In an elevator indicator, the combination with a series of switches and a series of groups of indicators at different floors of main circuit wires, and branches arranged to complete the circuit of each group of indicators indicating the same floor through the switch at that floor, and means for operating the switch to complete the circuit upon the approach of a car.

3. In an elevator indicator, the combination with a series of switches and a series of groups'of indicators at different floors, of main circuit wires, and branches arranged to complete the circuit of each group of indicators indicating the same floor, through the 42 and its downward switch at that floor, and means for operating the switch to complete the circuit upon the approach of a car.

. JOHN D. GRIFFEN.

lVitnesses H. ALBERTUS Wesr,

MILTON M. GoLnsMirH. 

